List of top Instrumentation Engineering Questions

Which of the following is a constant loss in an electric machine?
A DC motor has an input power of \(5\,\text{kW}\) and total losses of \(1\,\text{kW}\). The efficiency of the motor is
The main function of an instrumentation amplifier is to
Semiconductor strain gauges typically have much higher gauge factors than metallic strain gauges, primarily due to
Piezoelectric transducers are best suited for measurement of
The power measured during the open-circuit test mainly represents
Which of the following is TRUE?
In a parallel resonant circuit, the line current at resonance is
For a series RLC circuit, the impedance locus is plotted in the complex plane, the impedance circle is at
An RC high-pass filter has \(R=10\,\text{k}\Omega\) and \(C=0.01\,\mu\text{F}\). The cut-off frequency is
A \(50\,\mathrm{Hz}\) sinusoidal voltage has a peak value of \(141\,\mathrm{V}\). Its RMS value is
Which of the following best represents an ideal current source?
An AC circuit has \(V_{\mathrm{rms}}=230\,\mathrm{V}\), \(I_{\mathrm{rms}}=5\,\mathrm{A}\) and power factor \(=0.8\), then the active power consumed is
A series RLC circuit has \(L=0.5\,\text{H}\), \(C=0.02\,\text{F}\). For critical damping, the required resistance \(R\) is
In Thevenin's theorem, if a circuit has \(V_{th}=20\,\mathrm{V}\), \(R_{th}=4\,\Omega\), then the load current for \(R_L=4\,\Omega\) is
A series RLC circuit has \(L=0.1\,\mathrm{H}\) and \(C=10\,\mu\mathrm{F}\), then the resonant frequency is
If a solenoid has \(500\) turns, length \(0.5\,\text{m}\) and cross-sectional area \(4\times10^{-4}\,\text{m}^2\), then its self-inductance is
Biot--Savart's law is most suitable for calculating magnetic field due to
A capacitor of \(50\,\mu\mathrm{F}\) is connected to a \(200\ \mathrm{V}\) battery. A dielectric of \(K=4\) is inserted. Find the new capacitance and stored energy.
Magnetic flux through a coil changes from \(8\ \mathrm{mWb}\) to \(2\ \mathrm{mWb}\) in \(0.2\ \mathrm{s}\). What is the induced emf?
An equal percentage valve has
The conductivity of the intrinsic semiconductor at absolute temperature is
Process reaction curve method of tuning is done for a system in
For measurement of mutual inductance we can use
Which of the following signals are generated by Wien-bridge oscillators?